Piston-cooling device for internal-combustion engines.



K; STE-INBEOKER. PISTON COOLING DEVICE FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED SEPT. '7, 1911.

1,063,615. I Patented June 3,1913.

I. II/

M Karl SteinbecKe ar;

KARL srnmnncxnn, on CHARLOTTENBURG, Assisnore To enumer- UNITED stratus 1? ATENT OFFICE,

ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

- PISTON-COOLING DEVIGE FOR INTERNAL-COMBUSTIQN ENGINES.

To all inhomit may concern Be it known that I, KARL STEINBEGKER, a sub ect of the King of Prussia, residing at Charlottenburg, Germany, have invented certain new and useful Improvements in Piston- Cooling Devices for Internal-Combustion Engines, of which the following is a specification.

: This inventionrelates to'internal combus tion engines, and especially to those in which the piston is provided with a chamber for a cooling medium, conveyed into and'out of said chamber by means of telescopic pipes One section of each of said :pip'es is stationary, while the other is secured to the piston and moves therewith. Heretofore a.

stutfing-box has been used to make a fluidtight joint between saidfixed and movable pipe sectionsfbut this consumes power and is quickly worn out when the engine runs rapidly. By my invention-the stuffing-bones are dispensed with, and an improved ar rangement of pipes is provided in which a narrow annular gap of considerable length is left between the relatively movable sec tions which effectually packs the joint.

The accompanying drawing is a longitudinal section of the piston of an internal combustion engine equipped with my invention.

I have shown only a portion of the engine cylinder 1, containing the packed piston 2, which has the usual cross-pin 3 forthe attachment of the pitma'n. The piston is hollow, having a chamber' at for a, cooling medium, such as water, which is caused to circulate through said chamber to carry oil any excess of heat. The chamber communicates -with two tubes 5,-6 secured to the piston with their axes parallel with that of the cylinder 1. These tubes oooperaterespectively with stationary pipes or tubes 7, 8, over which they slide telescopically or trombone fashion. The cooling fluid isconveyed to the chamber 4 through the pipe 7 and tube 5, and. finds exit from said chamber through the tube 6 and pipe 8. pipes lie close to the tubes, but do not touch them, so that there is left an annular gap 9, narrow enough and long enough to throttle most of the cooling fiuid-which attempts escape between said pipes and tubes, small quantity of said fluid w ll, however, find its way through the throttling gap, and

5 in order to collect and drain ofl" this leakage Specification of Letters Patent.

The

11 cooperating with. the nmvable, tubes 5, 6.;

and aflordingi a narrow gapofsuflicient PatentedJune-3, 1e13, Application filed September 7, i911. Serial No. mama.

length to pack-the joint. The lowen -part 1'2 of the jacketyis preferably of greater ca pacity thanthe upper portiontopermit a considerable accumulation at leakage fluid in case it flows for a short time faster than the drainage outlet or pipe 13- can, carry it away from said j acket., The cooling water is brought to the admission pipe 7 by t' .1 pipe a 14 and is led ofi from the .exit pipe 8 by the pipe 15. The pipes 7 and 8 may beeonvem iently supported by a plug-l6 insertedinto the lower of the jacket 10, which in turn 1s supported-preferably by an arm 17 at.-

tached to the cylinder 1. The leakage of the cooling fluid through the long nai row throttling gap will be smaller in proportion to the length and cross-section of said gap. The throttling section 11 may bedispensed with if the jacket is high enough and large enough and the drain pipe big enough to prevent the leakage fluid from overflowing the top of the jacket.

The invention is applicable to horizontal as well as to upright-engines I In accordance with the provisions of the patent statutes, I have described the principle of operation of my invention, together with the apparatus which I now consider to represent the-best'embodiment thereof; but I desire to have it understood that the apparatus shown is only illustrative, and that the invention can be carried out by other means.

What I claim as new and desire to secure by Letters Patent of the United States, is,--

1. The combination with a cylinder and a hollow piston therein, of means for conveying cooling fluid to and from'the piston, comprising two stationary concentric pipes or tubes, and a third tube secured to the piston and extending-into the annular space between the first two tubes, the relatively movable sections of said tubes being packed by means of the throttling gap between them. The combination with a. cylinder, of a hollow piston, stationary pipes parallel with the axis of said cylinder, tubes secured to said piston a-nd'telescoping over said sta- .-"rel'ativel 1 long, narrow throttling gap between hem, and cyhndrical jackets suroftelescopic pipes connected therewith and" affording throttling gaps between them, and

jackets surrounding saidpipes and providedwith drainage outlets at their lower ends and with throttling gap packing at their upper ends. r

5. The combination with a cylinder and a hollow piston therein, of means for conveying cooling fluid to and from the interior of the piston, comprising two concentric 'pipes or tubes mounted on the cylinder, a fluid conveying conduit connected to the :1 inner tube, a drain for conveying leakage '25 from the outer tube, and a third tube con nected to the interior of the piston and extending into the annular space between the first two tubes, there being a relatively small clearance between it and the walls of the other tubes.

6, The combination with a cylinder and an open ended piston therein having a water chamber at its closed end, of means for conveying cooling fluid to and from the chamber, comprising a tubular member secured to t'l e cylinder andprojecting into the open end of the piston, the outer portion of said member being of larger internal diameter than its inner portion, a drain leading from the enlarged portion of said member, a concentrically arranged tube within said memher, one end of the tube being secured in the outer end of the member, a fluid conveyin' conduit connected to the tube, and a t-llifl tube connected to the chamber in the piston and extending into the annular space between the first two tubes, there being a relatively small clearance between it and the walls of the other tubes.

In witness whereof, I have hereunto set my hand.

KARL STEINBECKER. 

